Vapor pressures of pentafluorodimethyl ether (E125) have been measured
from (228 to 331) K using two ebulliometers. Experimental pressures r
anged from (65 to 2024) kPa. Thermodynamic calculations were used to e
stimate pressures down to 140 K (16.5 Pa), and a vapor pressure curve
is given which is valid from 140 K to the critical point (354.49 K). T
he normal boiling temperature was determned to be 238.06 K. The enthal
py of vaporization has been calculated from (140 to 300) K.